New York AGRICULTURAL EXPERIMENT STATION. 345 
Table I gives the plan and results of the experiments, and 
includes: Hosts from which cultures were obtained; kinds of 
trees. inoculated; number of inoculations made; growth of 
fuugus where inoculated. . 
TABLE I.—GROWTH OF SPH2ROPSIS FROM DIFFERENT SOURCES ON 
DIFFERENT HOstTs, 
Number of 
Hosts fiom which cultures inovhtations: Growth 
cf Seed were Kiud of aes inocu ated. mace in meres fungus. 
Apple tree......... | 4 Very good 
Paeuople irtit... 2.4. . calla Wa) EG oe! i aia aes ea oe 4 . 
ARGO a ieepip my. inith- J 4 0 
mooie TreG.. cet. || [ 4 Very good 
Saree st eurtiak, . 5 +35 f Beartitress cee Vb 4 4 gf 
NE Mia's iva so + os { 4 0 
mpre tree... s.. POEEAWUMOLIL cs ote cer tle tes [ 4 Very good 
meee ITuit. . 2... Crategus oryacuntha.... 4 4 yi 
BG 65s cee. ses f | 4 0 
PDD tee. ss picjaw oil: { 4 0 
eG ITUlC os wae Apricot (Russian)...... 4 4 0 
MNECR TSS ES OO 4 0 
ADDS ALG, 6%... 20 [ 4 0 
Oamapple fruit. 5.25. WOCRCI LTCC Cou ete ses 4 0 
OCC inns eae de es | if 0 
Mpoie Tee... ce. | [ a 0 
6+ Apple fruit........ fi, SUMACH v6iced esis cay tae > 4 4 0 
PMRPCCK 2: s vodka sod da § J | 4 ts 
BING trees. 6.62" { 4 O- 
7 Happie fruits s... ies Pe CRSIMNIOI GLb. t.ho 4 0 
1) Se oe J | 4 0 
Apple “tree... io. . [ 4 0 
Bere, IPiil, |. 5%e6 AOD HOrNHeAM. . 5 soe 934 4 0 
Me ae. ne so a8 [ 4 0 
Cultures of Sphwropsis as obtained from all of the hosts given 
in the table, save from the peach, were experimented with the 
previous season, and all were found to produce black rot of apple 
fruits readily, and all made some growth when inoculated into - 
apple and pear nursery trees. Table I shows that, on the other 
hand, the canker fungus refused to grow when inoculated into 
apricot, peach, sumach, persimmon or hop hornbeam. trees. 
Further experimenting will be necessary before the full signifi- 
cance of these negative results will be understood, but two ways 
of accounting for them come to mind. The first is that 
these hosts are, as has been supposed, attacked by different 
species of Sphwropsis. In this case, apple fruits must be 
regarded as a very favorable medium for the growth of these 
